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-rw-r--r--include/auth.php31
1 files changed, 27 insertions, 4 deletions
diff --git a/include/auth.php b/include/auth.php
index 8e02b7b4f..a8a1a5f5c 100644
--- a/include/auth.php
+++ b/include/auth.php
@@ -130,11 +130,34 @@ if((isset($_SESSION)) && (x($_SESSION,'authenticated')) && ((! (x($_POST,'auth-p
if($_SESSION['addr'] != $_SERVER['REMOTE_ADDR']) {
logger('SECURITY: Session IP address changed: ' . $_SESSION['addr'] . ' != ' . $_SERVER['REMOTE_ADDR']);
- if(get_config('system','paranoia')) {
- logger('Session address changed. Paranoid setting in effect, blocking session. '
+
+ $partial1 = substr($_SESSION['addr'],0,strrpos($_SESSION['addr'],'.'));
+ $partial2 = substr($_SERVER['REMOTE_ADDR'],0,strrpos($_SERVER['REMOTE_ADDR'],'.'));
+
+ $paranoia = intval(get_config('system','paranoia'));
+ switch($paranoia) {
+ case 0:
+ // no IP checking
+ break;
+ case 2:
+ // check 2 octets
+ $partial1 = substr($partial1,0,strrpos($partial1,'.'));
+ $partial2 = substr($partial2,0,strrpos($partial2,'.'));
+ if($partial1 == $partial2)
+ break;
+ case 1:
+ // check 3 octets
+ if($partial1 == $partial2)
+ break;
+ case 3:
+ default:
+ // check any difference at all
+ logger('Session address changed. Paranoid setting in effect, blocking session. '
. $_SESSION['addr'] . ' != ' . $_SERVER['REMOTE_ADDR']);
- nuke_session();
- goaway(z_root());
+ nuke_session();
+ goaway(z_root());
+ break;
+
}
}